115528209 has 16 divisors (see below), whose sum is σ = 166572288. Its totient is φ = 70944512.

The previous prime is 115528187. The next prime is 115528213. The reversal of 115528209 is 902825511.

It is a cyclic number.

It is not a de Polignac number, because 115528209 - 2⁵ = 115528177 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 115528209.

It is not an unprimeable number, because it can be changed into a prime (115528009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21702 + ... + 26495.

It is an arithmetic number, because the mean of its divisors is an integer number (10410768).

Almost surely, 2^115528209 is an apocalyptic number.

It is an amenable number.

115528209 is a deficient number, since it is larger than the sum of its proper divisors (51044079).

115528209 is a wasteful number, since it uses less digits than its factorization.

115528209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48264.

The product of its (nonzero) digits is 7200, while the sum is 33.

The square root of 115528209 is about 10748.4049514335. The cubic root of 115528209 is about 487.0378125739.

The spelling of 115528209 in words is "one hundred fifteen million, five hundred twenty-eight thousand, two hundred nine".